Transaction not yet indexed

MMb1TPrb3bZ7SNHB1856K1fGSxiq6JTnFNM5cTHfZcQuDnF9NNGUq2BXi27fUUFiShGipe9wq8wrRUNTktznB78

The transaction signature is valid but not yet indexed by this RPC node, or the transaction failed before inclusion.